Google Ads turns 20: The most important trends and changes of the past 5 years

http://feeds.searchengineland.com/~r/searchengineland/~3/4sLOrNiCgpQ/google-ads-turns-20-the-most-important-trends-and-changes-of-the-past-5-years-342645 In looking back, we can see where the biggest trends in search (and beyond) are heading.

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